Raiders owner Mark Davis has said that he wants to keep the team in Oakland, but he does not want to sign another short-term lease at the 47-year-old Coliseum without an agreement in place for a new stadium.

The team and city are working toward that, and there was a report Tuesday that the Raiders are proposing a 50,000-seat stadium that would cost $800 million. But league and city sources said those numbers were premature and inaccurate because both the Raiders and the city of Oakland have at this stage only commissioned studies to assess the economic feasibility of a new stadium.

Monday's meeting with city officials and the county joint board that runs O.co Coliseum was exploratory, and no formal proposals were made. No Raiders team official was present at the meeting.

"Both sides are conducting studies to determine the demand and financial viability of the project," Raiders director of public affairs Mike Taylor said in a statement. "There is a real sense of urgency for both parties."

The team's lease expires at the end of the 2013 season.

The Oakland Tribune reported that David Stone, a consultant hired by the Oakland-Alameda County Coliseum Authority, told the city Monday that the Raiders proposed putting $300 million into the stadium, and the NFL would likely put in $200 million from its stadium loan program. That would require about $300 million in public funding.

Stone's firm, AECOM, is advising Oakland and Alameda County officials on stadium construction and Stone said Monday that a team-commissioned study found enough demand for a new stadium at its current site.

The 50,000 seats would be even less than the Raiders will have next season when they tarp off the third deck. In hopes of avoiding TV blackouts, the Raiders are reducing capacity at O.co Coliseum to about 53,000, the lowest number in the league by 8,500 (Solider Field, Chicago.)